Using correct specification chapter reference for DCBAAP
(Device Context Base Address Array Pointer).
Signed-off-by: NPeter Chen <peter.chen@nxp.com>
Signed-off-by: NMathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Use the modern API to request MSI or MSI-X interrupts, which allows us to
get rid of the msix_entries array, as well as cleaning up the cleanup
code.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NMathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch sets resume_quirk() for R-Car controllers to re-download
the firmware in resume timing. Otherwise, if the controller's power
is down in suspend timing, the firmware in the controller goes away,
and then the controller doesn't work after resume.
Signed-off-by: NYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: NMathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch adds resume_quirk() to do platform specific process in
resume timing.
Signed-off-by: NYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: NMathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch enables the clk in resume timing when device_may_wakeup()
is false. Otherwise, kernel panic happens when R-Car resumes the system
from Suspend-to-RAM because the clk is disabled.
Signed-off-by: NYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: NMathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Enable the xHCI plat runtime PM for parent device to suspend/resume
xHCI. Also call pm_runtime_forbid() in probe() function to force users
to explicitly enable runtime pm using power/control in sysfs, in case
some parent devices didn't implement runtime PM callbacks.

[set do_wakeup to true when runtime suspending -Mathias]
Signed-off-by: NBaolin Wang <baolin.wang@linaro.org>
Signed-off-by: NMathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Since when we got rid of usbfs, the /proc/bus/usb is now
elsewhere. Fix references for it.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>
Acked-by: NSerge Hallyn <serge@hallyn.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Merge tag 'usb-ci-v4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/peter.chen/usb into usb-next

Peter writes:

Two changes for this v4.12-rc1:
- Add sysfs entry for role switch
- Update gadget state after gadget back from suspend

The DMA may hang up if a teardown is initiated while an endpoint is still
active (Advisory 2.3.27 of DA8xx errata).
To workaround this issue, add a delay before to initiate the teardown.
Signed-off-by: NAlexandre Bailon <abailon@baylibre.com>
Signed-off-by: NBin Liu <b-liu@ti.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Currently, only the PIO mode is supported.
This add support of CPPI 4.1 to DA8xx.
As in DA8xx the CPPI 4.1 DMA is a part of the USBSS, create the CPPI 4.1
device as a child of USB.
Signed-off-by: NAlexandre Bailon <abailon@baylibre.com>
[b-liu@ti.com: minor tweak in the commit log]
Signed-off-by: NBin Liu <b-liu@ti.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

In the DA8xx, USB and CPPI 4.1 are sharing the same interrupt line.
Update the driver to request a shared irq.
Signed-off-by: NAlexandre Bailon <abailon@baylibre.com>
Signed-off-by: NBin Liu <b-liu@ti.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

DIV_ROUND_UP is bit useful than series of "/" and "%" operations.
Replace "/%" sequence with DIV_ROUND_UP macro.
Signed-off-by: NIvan Safonov <insafonov@gmail.com>
Signed-off-by: NBin Liu <b-liu@ti.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

commit a6ff6cbf ("usb: xhci: Add helper function xhci_set_power_on().")
created a helper to control port power that needs to be called with
xhci->lock held and interrupts disabled.
It released the lock with spin_unlock_irqrestore using a new zero flag
variable instead of the original flag from spin_lock_irqsave.
This regression triggered a static checker warning about bogus flags, and
a null pointer dereference on armada-385.

Fix it by passing a pointer to the correct flags and using it instead

Fixes: a6ff6cbf ("usb: xhci: Add helper function xhci_set_power_on().")
Cc: Guoqing Zhang <guoqing.zhang@intel.com>
Reported-by: NRalph Sennhauser <ralph.sennhauser@gmail.com>
Tested-by: NRalph Sennhauser <ralph.sennhauser@gmail.com>
Signed-off-by: NMathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Sometimes, the user needs to adjust some properties for controllers, eg
the role for controller, we add sysfs group for them.

The attribute 'role' is used to switch host/gadget role dynamically, the
uewr can read the current role, and write the other role compare to
current one to finish the switch.
Signed-off-by: NPeter Chen <peter.chen@nxp.com>

Felipe writes:

usb: changes for v4.12

With 51 non-merge commits, this is one of the smallest USB Gadget pull
requests. Apart from your expected set of non-critical fixes, and
other miscellaneous items, we have most of the changes in dwc3 (52.5%)
with all other UDCs following with 34.8%.

As for the actual changes, the most important of them are all the
recent changes to reduce memory footprint of dwc3, bare minimum
dual-role support on dwc3 and reworked endpoint count and
initialization routines.

Update Kconfig help for fifo_mode = 0 to explain the behavior better.
Signed-off-by: NCristian Birsan <cristian.birsan@microchip.com>
Acked-by: NNicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Use dev_err() to display EP configuration error to avoid silent failure.
Signed-off-by: NCristian Birsan <cristian.birsan@microchip.com>
Acked-by: NNicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

If dr_mode is "otg" then support dual role mode of operation.
Currently this mode is only supported when an extcon handle is
present in the dwc3 device tree node. This is needed to
get the ID status events of the port.

We're using a workqueue to manage the dual-role state transitions
as the extcon notifier (dwc3_drd_notifier) is called in an atomic
context by extcon_sync() and this doesn't go well with
usb_del_gadget_udc() causing a lockdep and softirq warning.
Signed-off-by: NRoger Quadros <rogerq@ti.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

We can't have both Host and Peripheral roles active at the same time
because of one detail on DWC3: it shares the same memory area for both
Host and Peripheral registers.

When swapping roles we must reinitialize the new role every
time. Let's make sure this works for our debugfs interface.
Signed-off-by: NRoger Quadros <rogerq@ti.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Each role is mutually exclusive, the | operator is unnecessary. Remove
it.
Signed-off-by: NRoger Quadros <rogerq@ti.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

We're going to use this member to track which role we're currently
playing, that way we can more easily implement dual-role swap in
upcoming patches.
Signed-off-by: NRoger Quadros <rogerq@ti.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

allow usb_del_gadget_udc() and usb add_gadget_udc() to be called
repeatedly on the same gadget->dev structure.

We need to clear the gadget->dev structure so that kobject_init()
doesn't complain about already initialized object.
Signed-off-by: NRoger Quadros <rogerq@ti.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

It's much simpler to just add one extra TRB chained to previous TRB to
handle ZLP. This helps us reduce pointless allocations and simplifies
the code a little bit.
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Just like we did for all other endpoint types, let's rely on a chained
TRB pointing to ep0_bounce_addr in order to align transfer size. This
will make the code simpler.
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Instead of constantly recomputing how dwc and epnum relate to dep,
just pass dep as argument.
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

If we pass TRB's own address on bpl/bph fields, we can get our SETUP
packet as immediate data on the TRB itself, without having to allocate
extra memory for it.
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

There are several inconsistencies in the error handling code.
1. If clk_get() fails, it goes to clk_put().
2. If pdata->phy_init() fails, it does not disable u3d->clk.
3. In case of failure after stopping u3d, it does pdata->phy_deinit()
   and clk_disable(u3d->clk) twice.
4. It ignores failures in clk_enable().

Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: NAlexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Check fifo configuration values against device tree values for endpoint fifo
in auto configuration mode (fifo_mode=0).
Signed-off-by: NCristian Birsan <cristian.birsan@microchip.com>
Acked-by: NNicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Currently the of glue code in fsl-mph-dr-of will create the platform
device fsl-usb2-udc. As this driver should also be probed by this name,
this patch adds it to the devtypes list.
Signed-off-by: NMichael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

That helper can be used from our tracepoint interface with very minor
edits. Let's do so.
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

In order to improve usability a tiny bit, we will return strings that
match what our tracepoints return.
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Instead of redecoding link state into a string, use our helper.
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

When writing, we expect the "otg" string. When showing, we return
"OTG". Let's downcase that word to avoid confusion.
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

This patch splits the amd5536udc driver into two -- one that does
pci device registration and the other file that does the rest of
the driver tasks like the gadget/ep ops etc for Synopsys UDC.

This way of splitting helps in exporting core driver symbols which
can be used by any other platform/pci driver that is written for
the same Synopsys USB device controller.

The current patch also includes a change in the Kconfig and Makefile.
A new config option USB_SNP_CORE will be selected automatically when
any one of the platform or pci driver for the same UDC is selected.

Main changes:
- amd5536udc_pci.c: PCI device registration is moved to this file.

- amd5536udc.c:
  This file does rest of the core UDC fucntionality.
  9 symbols are exported so as to be used by amd5536udc_pci.c.
  Module parameter definitions are moved to header file.

- amd5536udc.h:
  Function declarations, module parameters definitions and few common
  header file includes are added to this file

- Kconfig:
  New USB_SNP_CORE option is added which will be auto selected when
  any pci or platform driver config option for the UDC is chosen.

- Makefile:
  Compiles the core and pci files separately.
Signed-off-by: NRaviteja Garimella <raviteja.garimella@broadcom.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

This patch adds support for usb role swap via sysfs "role".

For example:
 1) Connect a usb cable using 2 Salvator-X boards.
  - For A-Device, the cable is connected to CN11 (USB3.0 ch0).
  - For B-Device, the cable is connected to CN9 (USB2.0 ch0).
 2) On A-Device, you input the following command:
  # echo peripheral > /sys/devices/platform/soc/ee020000.usb/role
 3) On B-Device, you input the following command:
  # echo host > /sys/devices/platform/soc/ee080200.usb-phy/role

Then, the A-Device acts as a peripheral and the B-Device acts as
a host. Please note that A-Device must input the following command
if you want the board to act as a host again.
 # echo host > /sys/devices/platform/soc/ee020000.usb/role
Signed-off-by: NYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

Minor code cleanup based on feedback received on mailinglist.
Acked-by: NNicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: NCristian Birsan <cristian.birsan@microchip.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

This patch adds extcon support to see VBUS/ID signal states.
Signed-off-by: NYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

This usb 3.0 peripheral controller has a register (USB_OTG_STA) to monitor
the USB ID signal. So, this patch adds the ID signal monitoring to change
the mode to host (A-Host) or peripheral (B-Peripheral).
This patch also removes hardcoded setting as B-Peripheral mode.
Signed-off-by: NYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

If usb/otg-fsm.h and usb/composite.h are included together
then it results in the build warning [1].

Prevent that by defining VDBG locally.

Also get rid of MPC_LOC which doesn't seem to be used
by anyone.

[1] - warning fixed by this patch:

In file included from drivers/usb/dwc3/core.h:33,
   from drivers/usb/dwc3/ep0.c:33:
   include/linux/usb/otg-fsm.h:30:1: warning: "VDBG" redefined
   In file included from drivers/usb/dwc3/ep0.c:31:
   include/linux/usb/composite.h:615:1: warning: this is the location
   of the previous definition
Signed-off-by: NRoger Quadros <rogerq@ti.com>
Reviewed-by: NJun Li <jun.li@nxp.com>
Acked-by: NPeter Chen <peter.chen@nxp.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

To avoid checkpatch warnings with new patches let's
start using the BIT() macro wherever possible.
Signed-off-by: NRoger Quadros <rogerq@ti.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>